<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <div class="box">
    <!-- <input type="checkbox" name="科幻" id="" value="科幻">科幻 -->
    <ul>
      <li v-for="item in list"><input type="checkbox" v-model="arr" :value="item" :key="+new Date()">{{item}}
      </li>
    </ul>
    <ol>
      <li v-for="item in arr">{{item}}</li>
    </ol>
  </div>


  <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
  <script>
    const app = new Vue({
      el: '.box',
      data: {
        arr: [],
        list: ['科幻', '喜剧', '动漫', '冒险', '科技', '军事', '娱乐', '奇闻']
      },

    })
  </script>
</body>

</html>